What serves as the ultimate electron acceptor in the electron transport chain during respiration?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

PPSCFPSCNTSPakistan govt jobs
Subject
Biology Mcqsbiology-mcqs
Published
23 May 2018
Last updated
28 May 2026

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Explanation

In cellular respiration, electrons are transferred through a series of carriers and finally accepted by molecular oxygen, which combines with protons to form water. NADH and cytochrome a3 are intermediate carriers, while water is the product formed after oxygen accepts electrons.

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